Introducing Claude Fable 5.2 and Claude Mythos 5.2, designed to tackle the most daunting technical challenges.
They’re capable collaborators on ambitious projects in many fields, and show improvements in areas like coding, reasoning, and vision.
Introducing GPT‑6 Cyber: a major advance in security research that pairs stronger capabilities with better model alignment.
The model powered the Linux kernel research we announced yesterday, and security teams at companies like Mozilla, Palo Alto Networks, Calif, and Cisco—alongside our own at OpenAI—are already putting it to work.
GPT-6 Cyber is available to select Daybreak Red customers and we are expanding access over time.
https://t.co/Nzab3Z1Td6
Today was my last day at Anthropic.
I am so thankful for the time I got to spend there. I couldn't be more thankful for the time I spent and the connections I made.
Will be taking some time off as I prepare for my next thing. I'll share more soon :)
We asked GPT-6 Astra to edit Qwen3.5-0.8B weights to improve math.
It directly changed only 0.016% of weights, fixing 0.8B's reasoning loops & improving math up to 6x and even instruction following 3x, without gradients or training.
We call this Weight-Space Programming: frontier LLMs can now natively read/write neural network weights! 🧵
Blog: https://t.co/bOWCcFhCVq
this Anthropic paper f*cking insane
it's pretty much the 9-step system top AI engineers run before every single prompt they send.
every step, every formula, the full copy-paste template, all of it spelled out.
paste it into Opus 5.5 once and your outputs instantly go from mid to scary good.
the crazy part is anthropic has been recommending this exact structure in their own docs the whole time and 99% of people still just type "write me a…" and wonder why AI sucks.
full breakdown in the article below.
bookmark it before this thread gets buried.
The most famous person I've ever spoken to? I sat next to Richard Feynman on a plane once, and we chatted. In fact, more than once. And I had dinner with him several thousand times. And I spent a few months inside his wife's womb.
To the Moon wasn't the first game I made, but it was the lucky one to be known by a wider audience
But beyond luck, it was thanks to @supershigi who helped bring the game to more people, @ancurio for making it technically possible, & many others who shaped the game & community
For To the Moon's 15th anniversary, I'm announcing <Conversations with My Imaginary Friends>:
A free, personal game that's part diary, part time capsule spanning 20 years, told with handcrafted pixel art and illustrations by the artists at @freebird_games